No subject
Fri Sep 4 18:35:13 PDT 2009
a 14-inch reflector until a nebula filter was added...=20
=20
One of the best reports came from Joanne Konst of Kenton=2C Ohio: "NGC-7293=
=2C the Helix Nebula=2C is invisible without a UHC filter=2C" she writes. "=
But with the filter I see a round glow about 15' across=2C and a dark cente=
r is obvious. Three stars are seen against the nebulosity=2C but otherwise =
there is no detail. =20
=20
Roger Ivester: The first time I observed the Helix nebula was on August 29t=
h 1992. My notes were rather brief. Using a 10-inch reflector and a 26mm ey=
epiece at 44x=2C could easily see a mostly round shape. Best observed at lo=
w power. Due in part to it's southerly location and the lights of distant c=
ities the contrast was reduced significately. Very little detail was noted.=
Tom English and a few others also observed that night from a pasture sever=
al miles west of Boiling Springs=2C N.C.=2C and we observered from 9:45 til=
l 3:00 AM.=20
=20
I observed it again the following month. My notes this time indicated that =
it was almost impossible to see without the use of a nebula filter=2C using=
a 10-inch reflector. =20
=20
Tom Lorenzin: The Amateur Astronomer's Field Guide to Deep-sky Observing =20
N-filter helps a lot on this! Four faint stars on W side (two NW and two SW=
)=3B N-filter shows center more rarefied though 13M center star not visible=
in interior glow=3B visible in binoculars. =20
=20
Brian Skiff/Christian Luginbuhl: Observing Handbook And Catalogue Of Deep-=
Sky Objects Dimen. 12' x 10'=3B Visual 7.3=3B star V =3D 13.4
The Helix Nebula is a large=2C dim planetary that can be seen with 7 x 35-m=
m binoculars in dark sky. It is faintly visible in 15 cm=2C appearing abou=
t 15' diameter with several stars embedded. The center of the nebula is sl=
ightly darker. In 25 cm it is oblong with a fairly distinct hole in the ce=
nter. Some details are visible=2C and a close pair on the S side is resolv=
ed. 30 cm reveals ten stars in the nebula including the central star and a=
companion. A brighter band of nebulosity aligned N-S lies on the E side b=
etween two stars. Bright spots are also visible on the NW and SW portions.=
The annularity is indistinct.=20
=20
James Mullaney: Celestial Harvest=3B dimens: 12' x 16'=3B Mag. 6.5/13.5=20
This annular or ring-like appearance is not generally easy to make out visu=
ally regardless of what size instrument is used. Strangely missed by both H=
erschels. Unlike any PN in the sky - 1/4=B0 across.
=20
=20
=20
=20
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=20
The moon and stars to govern the night..... Psalm 136:9
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<STRONG>All=2C<BR></STRONG> =3B<BR>Some information concrning =3Bth=
e September observers challenge...<BR>
<STRONG></STRONG> =3B<BR>
<STRONG>NGC-7293=3B PN=3B Aquarius=3B =3Balso known as the "Helix Nebul=
a" </STRONG><BR>
 =3B<BR><STRONG>Challenge: Overall shape=2C stars within the nebula inc=
luding the 13M central star=2C =3Band the central void.</STRONG> =
=3B<BR><STRONG> =3B<BR>Walter Scott Houston=2C <EM>Deep-Sky Wonders</EM=
>=2C Selections and Commentary by =3BStephen O'Meara</STRONG>. =3B<=
BR> =3B<BR><STRONG>WSH:</STRONG> Magnitude of about 6=2C but its large =
apparent diameter...nearly half that of the Moon...spreads the light out an=
d makes it a difficult object visually. I recently saw the Helix with a 4-i=
nch Clark refractor=2C and was certain that it was glimpsed in a 2-inch fin=
der. Burnham notes that in his Celestial Handbooks that it can be spied in =
binoculars. =3BSmall telescopes in relatiely poor skies seldom revealed=
color. <STRONG>Ted Komorowski</STRONG> =3Btold of a gray disc easily v=
isible in his <STRONG>8-inch f/7.5 at 56x</STRONG>.<BR> =3B<BR><STRONG>=
Note: This scope is =3Bhoused at the Williams Observatory on campus at =
Gardner-Webb University in Boiling Springs=2C North Carolina. =3BOver t=
he years this scope has come to be known =3Bas the Komorowski Comet sco=
pe. =3BTed was a member of the Charlotte Amateurs during the 60's and l=
ater. =3B =3BRoger Ivester</STRONG><BR> =3B<BR><STRONG>WSH: The=
nebula's central hole was sighted</STRONG> =3B<STRONG>by only a few ob=
servers=2C</STRONG> who included Michael Pleinis=2C Aberdeen=2C South Dekot=
a (4-and 6-inch telescopes)=2C and Mark =3BGrunwald=2C Mishawaka=2C Ind=
iana=2C among others. <BR> =3B<BR>From Riverside=2C California=2C =
=3BStephan Karnes coul not see the Helix with a 14-inch reflector until a n=
ebula filter was added... =3B<BR> =3B<BR>One of the best reports ca=
me from Joanne Konst of Kenton=2C Ohio: "NGC-7293=2C the Helix Nebula=2C is=
invisible without =3Ba UHC filter=2C" she writes. "But with the filter=
I see a round glow about 15' across=2C and a dark center is obvious. Three=
stars are seen against the nebulosity=2C but otherwise there is no detail.=
 =3B =3B<BR> =3B<BR><STRONG>Roger Ivester</STRONG>: The first&=
nbsp=3Btime I observed the Helix nebula was on August 29th 1992. My notes w=
ere rather brief. Using a 10-inch reflector and a 26mm eyepiece at 44x=2C&n=
bsp=3Bcould easily see a mostly round shape. =3BBest observed at low po=
wer. Due in part to it's southerly location and the lights of distant citie=
s =3Bthe contrast was reduced significately. Very little detail was not=
ed. Tom English and a few others also observed that night from a =3Bpas=
ture =3Bseveral miles west of Boiling Springs=2C N.C.=2C and we observe=
red from 9:45 till 3:00 AM. <BR> =3B<BR>I observed it again =3Bthe =
following month. My notes this time indicated that it was almost impossible=
to see without the use of a nebula filter=2C using a 10-inch reflector.&nb=
sp=3B =3B<BR> =3B<BR><STRONG>Tom Lorenzin</STRONG>: <EM>The Amateur=
Astronomer's Field Guide to Deep-sky Observing =3B =3B</EM><BR>N-f=
ilter helps a lot on this! Four faint stars on W side (two NW and two SW)=
=3B N-filter shows center more rarefied though 13M center star not visible =
in interior glow=3B visible in binoculars. =3B =3B<BR><EM></EM>&nbs=
p=3B<BR><STRONG>Brian Skiff/Christian Luginbuhl: =3B </STRONG><EM>Obser=
ving Handbook =3BAnd Catalogue Of Deep-Sky Objects</EM><STRONG>  =
=3B</STRONG>Dimen. 12' x 10'=3B =3BVisual 7.3=3B star V =3D 13.4<BR>The=
Helix Nebula is a large=2C dim planetary that can be seen with 7 x 35-mm b=
inoculars in dark sky. =3B It is faintly visible in 15 cm=2C appearing =
about 15' diameter with several stars embedded. =3B The center of the n=
ebula is slightly darker. =3B In 25 cm it is oblong with a fairly disti=
nct hole in the center. =3B Some details are visible=2C and a close pai=
r on the S side is resolved. =3B 30 cm reveals ten stars in the nebula =
including the central star and a companion. =3B A brighter band of nebu=
losity aligned N-S lies on the E side between two stars. =3B Bright spo=
ts are also visible on the NW and SW portions. =3B The annularity is in=
distinct. =3B<BR> =3B<BR><FONT face=3DArial><STRONG><FONT face=3DVe=
rdana>James Mullaney:</FONT> </STRONG><FONT face=3DVerdana><EM>Celestial Ha=
rvest</EM>=3B dimens: 12' x 16'=3B  =3BMag. 6.5/13.5 =3B</FONT></FO=
NT><BR>
<FONT face=3DArial><FONT face=3DVerdana>This annular or ring-like appearanc=
e is not generally easy to make out visually regardless of what size instru=
ment is used. Strangely missed =3Bby both Herschels. Unlike any PN in t=
he sky - 1/4=B0 across.</FONT></FONT><BR>
<FONT face=3DArial><FONT face=3DVerdana></FONT></FONT> =3B<BR>
<FONT face=3DArial><FONT face=3DVerdana> =3B</FONT></FONT><BR>
<FONT face=3DArial><FONT face=3DVerdana></FONT></FONT> =3B<BR>
<FONT face=3DArial><FONT face=3DVerdana></FONT></FONT> =3B<BR>
<FONT face=3DArial><FONT face=3DVerdana></FONT></FONT> =3B<BR>
<FONT face=3DArial><FONT face=3DVerdana> =3B =3B =3B =3B</F=
ONT></FONT><BR>
<FONT face=3DArial><FONT face=3DVerdana> =3B</FONT><BR><FONT size=3D4><=
/FONT> =3B</FONT><BR><FONT face=3DArial></FONT> =3B<FONT face=3DAri=
al> =3B<BR></FONT><EM><FONT face=3DArial><STRONG> =3B =3B =
=3B </STRONG></FONT>The moon and stars to govern the night..... =3B&nbs=
p=3B Psalm 136:9</EM><BR><BR><BR><BR><BR><BR><BR>
<HR>
<BR>
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